In capitalist America, we bear arms
In soviet Russia, we arm bears

Iron Brigade/ Trenched had a rough start, with IP issues in EU, delayed patches and finally the limited longevity. Finally before the DLC, all those problems are been solved by Double Fine and Microsoft.This dlc will extend its contents further in Mars.

the dlc added several more tubes type that are alot more tougher than the original. Technically players are playing on the 4th campaign, and are expected to be level 10 and above.

Price at 400msp ($5), provide huge content to extend the longevity of the game. 4th campaign itself clock about 4hrs. I high recommend players to get this dlc if you already own trenched/iron brigade. However, if iron brigade does not interest you, this dlc will not.